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All results from a given calculation for CH3CCH (propyne)

using model chemistry: MP2=FULL/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at MP2=FULL/TZVP
 hartrees
Energy at 0K-116.372933
Energy at 298.15K 
HF Energy-115.904773
Nuclear repulsion energy58.667883
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2=FULL/TZVP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3520 3353 54.06 36.38 0.19 0.31
2 A1 3094 2947 16.05 192.76 0.00 0.01
3 A1 2169 2066 2.09 73.66 0.23 0.37
4 A1 1441 1373 0.05 10.04 0.58 0.74
5 A1 950 905 0.86 3.35 0.11 0.20
6 E 3181 3030 7.06 69.85 0.75 0.86
6 E 3181 3030 7.06 69.85 0.75 0.86
7 E 1505 1433 8.27 10.89 0.75 0.86
7 E 1505 1433 8.27 10.89 0.75 0.86
8 E 1068 1018 0.00 0.07 0.75 0.86
8 E 1068 1018 0.00 0.07 0.75 0.86
9 E 539 514 58.03 0.68 0.75 0.86
9 E 539 514 58.03 0.68 0.75 0.86
10 E 158 150 0.45 13.31 0.75 0.86
10 E 158 150 0.45 13.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12036.6 cm-1
Scaled (by 0.9527) Zero Point Vibrational Energy (zpe) 11467.3 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/TZVP
ABC
5.37389 0.28475 0.28475

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/TZVP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.243
C2 0.000 0.000 0.215
C3 0.000 0.000 1.427
H4 0.000 0.000 2.488
H5 0.000 1.019 -1.627
H6 0.882 -0.509 -1.627
H7 -0.882 -0.509 -1.627

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45802.66993.73071.08871.08871.0887
C21.45801.21192.27272.10532.10532.1053
C32.66991.21191.06083.21973.21973.2197
H43.73072.27271.06084.23944.23944.2394
H51.08872.10533.21974.23941.76431.7643
H61.08872.10533.21974.23941.76431.7643
H71.08872.10533.21974.23941.76431.7643

picture of propyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 180.000 C2 C1 H5 110.679
C2 C1 H6 110.679 C2 C1 H7 110.679
C2 C3 H4 180.000 H5 C1 H6 108.237
H5 C1 H7 108.237 H6 C1 H7 108.237
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability